<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #hz {
            display: flex;
            height: 100vh;
            flex-direction: column;
            align-items: center;
        }

        #hz div,
        p {
            width: 60px;
            height: 60px;
            border: 1px solid rgb(51, 153, 82);
            margin-right: 10px;
        }

        p {
            margin: 0;
        }

        #hz div:nth-child(1) {
            align-self: flex-start;
            width: 90vw;
            display: flex;
            justify-content: space-around;
        }
    </style>
</head>

<body>
    <div id="hz">
        <div>
            <p>a</p>
            <p>b</p>
            <p>c</p>
        </div>
        <div>2</div>
        <div>3</div>
        <div>4</div>
    </div>
</body>

</html>